STRUCT COMMAND_PROTOCOL_BL(9)

🌸 NAME 🌸

okay so bestie, this page is struct command_protocol_bl(9) from the Kernel API Manual — and it's literally the keyboard backlight brightness setter message vibe 💡✨

• struct command_protocol_bl — set keyboard backlight brightness
• message.type = 0xB051, message.length = 0x0006

✨ SYNOPSIS ✨

here's the exact struct, no cap 🫶

struct command_protocol_bl {
    __le16 const1;
    __le16 level;
    __le16 const2;
    __le16 crc16;
 };

💅 Members 💅

• const1 — value: 0x01B0. fixed lil' buddy, periodt 🎀
• level — the brightness level to set. this is the main character of the struct, fr fr ✨
• const2 — value: 0x0001 (backlight off), 0x01F4 (backlight on). it's giving on/off energy 💡
• crc16 — crc over the whole message struct (message header + this struct) minus this crc16 field. yes bestie, the checksum covers everything except itself 🧮💅

🦋 SEE ALSO 🦋

• Kernel file ./drivers/input/keyboard/applespi.c struct keyboard_protocol(9)
• struct tp_finger(9)
• struct touchpad_protocol(9)
• struct command_protocol_tp_info(9)
• struct touchpad_info_protocol(9)
• struct command_protocol_mt_init(9)
• struct command_protocol_capsl(9)
• struct message(9)
• struct spi_packet(9)

that's the whole page, bestie 🎀 source/version: ./drivers/input/keyboard, date: October 2026, title still struct command_protocol_bl(9) — slay, you understood the assignment 💖